For those of you with HDMI/DVI trouble, please give https://bigfoot.morphos-team.net/test/Radeon
(md5sum: c454a3be7c82faf62451d4ddbc4d8862) a try.
Download the file and copy it to mossys:Devs/Monitors - make sure it overwrites the original Radeon file, as having two different Radeon monitor files present won't work. Also double check that the file has the executable file protection bit set after downloading/copying, and finally make sure you have installation media ready in case it doesn't work right.
HDMI and DVI works both on R5-230